ca.sqlpower.wabit.swingui.report.selectors.FancyComboBoxSelector.java Source code

Introduction

Here is the source code for ca.sqlpower.wabit.swingui.report.selectors.FancyComboBoxSelector.java

Source

/*
 * Copyright (c) 2010, SQL Power Group Inc.
 *
 * This file is part of Wabit.
 *
 * Wabit is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * Wabit is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>. 
 */

package ca.sqlpower.wabit.swingui.report.selectors;

import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.util.Collection;
import java.util.concurrent.atomic.AtomicBoolean;

import javax.swing.JComboBox;
import javax.swing.SwingUtilities;

import org.apache.commons.lang.ObjectUtils;

import ca.sqlpower.object.AbstractPoolingSPListener;
import ca.sqlpower.object.SPListener;
import ca.sqlpower.wabit.report.selectors.ComboBoxSelector;
import ca.sqlpower.wabit.report.selectors.Selector;
import ca.sqlpower.wabit.report.selectors.SelectorListener;

public class FancyComboBoxSelector extends JComboBox implements SelectorComponent {

    private final ComboBoxSelector selector;
    private final Runnable refreshRoutine;
    private AtomicBoolean ignoreEvents = new AtomicBoolean(false);

    private SPListener selectorListener = new AbstractPoolingSPListener() {
        protected void propertyChangeImpl(java.beans.PropertyChangeEvent evt) {
            if (!evt.getPropertyName().equals("parent"))
                refresh();
        };
    };

    private final SelectorListener selectionListener = new SelectorListener() {
        public void selectionChanged(Selector source) {

            Object currentSelection = selector.getCurrentValue();

            if (currentSelection != null && !ObjectUtils.equals(getSelectedItem(), currentSelection)) {
                setSelectedItem(currentSelection);
            }

            SwingUtilities.invokeLater(refreshRoutine);
        }
    };

    public FancyComboBoxSelector(ComboBoxSelector selector, Runnable refreshRoutine) {

        this.selector = selector;
        this.refreshRoutine = refreshRoutine;

        this.selector.addSPListener(selectorListener);
        this.selector.addSelectorListener(selectionListener);

        addItemListener(new ItemListener() {
            public void itemStateChanged(ItemEvent e) {
                if (ignoreEvents.get())
                    return;
                if (!ObjectUtils.equals(getSelectedItem(), FancyComboBoxSelector.this.selector.getCurrentValue())) {
                    FancyComboBoxSelector.this.selector.setSelectedValue(getSelectedItem());
                }
            }
        });

        refresh();
    }

    private void refresh() {
        ignoreEvents.set(true);
        try {
            removeAllItems();

            Collection<Object> values = selector.getPossibleValues();

            for (Object value : values) {
                addItem(value);
            }

            if (values.size() > 0) {
                setSelectedItem(selector.getCurrentValue());
            }

            SwingUtilities.invokeLater(refreshRoutine);
        } finally {
            ignoreEvents.set(false);
        }
    }

    public void cleanup() {
        this.selector.removeSPListener(selectorListener);
        this.selector.removeSelectorListener(selectionListener);
    }

}